RE2 was late 1990s in early 1990s £44.99 was the std price point for many PC CD games or even some floppy versions:
Day of The Tentacle CD-Rom £44.99
Fate Of Atlantis CD-Rom £44.99
The 7th Guest £69.99
Star Wars Rebel Assault £49.99
After a few years PC games went down a little to £29.99-£39.99 in mid to late 1990's with inflation they cost a lot of money compared to recent games

you could also walk into the Virgin Megastore Tottenham Court Road on release weekend usually & pick up a new PC game up to £10 cheaper then it went back up to full price & perhaps 6 months later it started to drop in price so you could grab a bargain then or wait for the re-release around £10.
GOTY boxed editions usually included the mission packs & were around the same price it would take up to 2 years before they were sold cheaply though as the retail PC games market used to price protect & keep prices high for a long time as there was no competition in the high st & few companies offered cheaper prices online.
Back on topic saw ACU for £17-20 on G2A probably the cheapest it will be for a few months.