http://i53.tinypic.com/w027hg.jpg...

How much do these things usually sell for? It has several Pokemon games on it (including Pokemon Green, which is a poorly translated version of the Japanese game) and a bunch of other big titles like DuckTales and Tetris.

As far as I know, it's more of whatever someone is willing to pay type item. I've seen them go for as little as a few dollars to quite a bit more. I think it's really down to trusting if the games are solid, battery will last or not, quailty of the cheap hk built pirate cart. One I had, GB style, a few years ago was picked up for $10USD and it had like 16 games of which 12 were unique. Currently I have a 115-in-1 NES cart, cost me $35 shipped from a member here out of Canada so stuff really can vary.

I just paid $5 for a 25-in-1.

I paid 50 cent for a 85-in-1 last week.

Like the others said, it really depends on what the buyer is willing to pay. But as far as I know, if you can get $20 for a multicart, then you are doing just fine.

Also depends what games are on there

Well, it looks like it has all of the Pokemons on it, so that should boost the price up I would imagine. Pokemon games are always hot items.

speaking of which, I'll probably sell this 25-in-1 I have...

They never have the real RPG pokemons (at least none I have seen) they have some hacked adventure/platform game.