Yes, they all check price online now, almost no chance to get a good find. 15-20 years ago I use to go to second hand shop and get out with a bag full of old Nintendo games for 50 bucks. Now you can barely buy 2 average games in loose for that price, at least in my country.
Discussion
Yep, though my way round it is to be friendly with the staff and let them know the things i look for, sometimes, they will tell me when something comes in and give it to me at a decent price ;) Nintendo games are the worst though, i gave up collecting SNES games as i can't afford anything that i want.