If its priced at the right amount, which should be £20-25 then people will buy it to experience that feeling again due to not having that console of choice any longer. If you've played it before then I'd agree on getting the cash - you would give it away for next to nothing for original owners if you could.
Whilst gameplay might, there are some old games, like this one, that has some unique challenges that people who didn't play Tomb Raider back in the day could find fun to play. Especially ones that can't afford full priced games. Still think you're right on the other part though lol. The old Tomb Raider games will still sit in my fun zone so I won't be dissing the gameplay on it.