I actually got mine at Bed Bath & Beyond with a 20% off coupon for about $40. It's cool system but the best part is to get the micro SD card in it full of 2600 games!
Granted for me, I prefer the PSP for playing the Activision classics. Nothing against the handheld. Also use my PSP for the Sega Genesis EA hits like Road Rash II.
For me, the Atari Flashback Handheld is worth the price for the portability but there are better ways available to play your classic games.
Oh sure there are better ways but it is a cool little device. I have an SD card in it full of binaries that make it even better as I have 100's of games on it now.