I feel ya man. I've never really been able to afford an AES habit either.
I'd love to be able to buy more and better AES games. But I won't shell out $200-$300+ for something I can just play emulated for free pretty much.
I got my AES back before the collectors boom... swapped my Sega CD for it. At the time people thought I was INSANE... well who's laughing now!?!
Plus I've grabbed a pretty decent collection of carts over the years just nickel-diming it, never springing for the new stuff, always the 2 year old KOF... you know how it is.