A whole bunch of Atari 5200 related goodies available for sale now... prices are somewhat negotiable if you think I've over valued it. Photos available for interested people.
Hardware
Modified 2600 paddle controller with 5200 connector (by ShawnSr) - $10
Software
Castle Blast CIB #13 (from 2002) - $100
Castle Crisis CIB - $35
Koffi Yellow Kopter #11 (sealed, from 2002) - $100
Boulderdash #59 (sealed) - $40
Flip and Flop #91 (sealed) - $45
Rent Wars #9 (sealed) - $40
Adventure II Limited Edition #178 CIB - $75
Final Legacy + box - $50
Sinistar + box - $50
Koffi + manual - $25
Beef Drop + manual - $25
Sean Kelly dip switch multicart - $75