Card shop? I don't think I've seen one in 20 years. When I was a kid, there were 3 just in my neighborhood! But that was when cards were hot and everyone from 8-88 thought they could make a tidy sum off them. The problem was that the card companies were making a tidy sum off the collectors by producing millions more cards. I thought I'd be able to retire off the cards I collected between the ages of 8-14! When I went to get them valued a couple of years ago, boy did I get a shock!
My suggestion to the OP, as I had the same problem of space recently: Either build a nuclear bunker and store them in there for a couple of hundred years until they gain some value or sell them on EBay for peanuts. I had a bunch of box sets and unopened wax boxes from the '80s that I sold for $20-30 each plus shipping. They went fairly quickly. If you have individual cards in albums, good luck! You won't be getting rid of those.