I think you are living in a bit of a fairytale..
Welcome to the new reality.
Retailers can't get stock and last thing they want to do with so many preorders is stockpile stock and any stock held now may loose value, so quicker they sell them now at the silly rates now the more profit they make.
Also massive depreciation of gpus is only caused by scaremongering as we saw with the 2080ti fire selling done by people that don't understand the value of the items they hold and by people that try to scare people into selling their items at a huge loss for their gains as many on this very forum have done many times and the sensible laugh at them. All electronic items have depreciation, but let's be real too..
Then you have people telling others now to wait for the 4000 series GPUS that will be soon out, soon out when ? Reality end of 2022 is the ealiest we will see a new generation and between then we will get super versions before anyone sees a 4080,4090 etc. Again done to stop people buying now so people with these fake stories can buy the cards available now.
A lot of silly things have been said by many forum users that make no sence in the reality of the situation we are in. Like yourself regarding retailers stockpiling 3080 and 3090 cards.. depreciation of an item that costs £2.4k to £700-800 in a year, you should go work for CEX, they have your mentality for depreciation value of items and then go sell them at over double the price they paid for them.
Wake up to what is happening and this is coming from an I.T professional that has been in the industry over 30 years. I warned people from the start this generation of cpus and gpus the prices are fake and will not be the price customers pay, don't believe me check my posts all way back to last year and this was before covid issues and brexit.
I'm guessing you are one of the customers still waiting for a chance to purchase the GPU you want and have become jaded or trying to justify yourself out of not buying, reality is if you have a working system that does what you need then wait and see how it turns out, but here is my crystal ball at work, this is the reality for a good few years to come, until more fabs come online and prices of manufacturing and materials comes down.
People in my line of work have seen this coming for years and the shrinking of nodes is getting harder and harder and more and more expensive.
Have a read.. costs involved to make these chips smaller and smaller (also read recently a new article that they actually will be more than stated on this article, need to find it) :-
https://www.extremetech.com/computing/272096-3nm-process-node
Money they are putting in to new fabs (guess who will pay for them ?) :-
https://www.tomshardware.com/uk/news/tsmc-capex-2021
So more demand and more people with money from every part of the world wanting in and not enough fabs or materials to make the items and the higher costs to make more modern nodes and manufacturing/R&D costs at these new nodes will equal more expensive electronic items... You just have to look at the shocking prices of smart phones now and last few years what was going to happen to all technology costs in the future.
Sadly this is the world we have all created and now starting to show how things have not worked out as planned and is only going to get worse for a while till we catch up with new fabs that are needed and better ways to make electronic devices in the future, the node shrinking on silicon is soon coming to an end too, you can only die shrink to a point and then the laws of physics come hammering down as they are doing now, look at Intel as an example why are they still stuck on 14nm and only now started fabs up to do 10nm.. Why is cost and also it's very hard to do and soon will become impossible to die shrink anymore on silicon wafers. These companies need to make profits, they will not sell their wares for a loss and Intel we laugh at but reality is the costs would have desroyed them in recent years if they tried to compete with TSMC for example, this is why they are going to use TSMC in the future too, while they get their act together on the manufacturing and to have fabs that can run and make profits on new die shrinks.
People need to wake up why costs are rocketing too, it's not just covid and miners and every other excuse, it's basically the situation the industry is in right now, the moores law of every two years, prices will half and products will be twice as powerful is coming to an end and I think it came to an end regarding costs a good few years back and costs are going threw the roof now and yes we are getting more powerful devices but at a cost that is not halving anymore..
Anyways that's my rant. Sadly new reality that we will all have to live with soon regarding all electronic items with the latest tech.