I think it is the best time to sell.
Few cards (not only the 30 odd quid ones) started to be available, but at very high prices.
I think as more cards start to be available, won't be long until prices are more reasonable.
At the moment, manufacturers and retailers are simply gauging prices and trying to profit from those customers that aren't aware that they're not buying the last GPU mankind will ever produce, but only one of the many that started to be available.
A 2060 costing more than I paid for my brave previous 2080 on release day, just justifies what I said.
Selling old tech (not judging the card's performance, which many still be very good), no thanks.
When I decided to go with the 3090, madness, £1600, but I wasn't going to pay £1400 for a 3080.
My initial plan was a 3080, but considering how much the difference was, I thought I would lose much less in the future selling the 3090 (which was very close to MSRP) than I would selling a card that was almost double of its MSRP.
I expect things to improve in the next 3 to 6 months, unless things go south again.
About Intel GPUs, another choice is always welcome.