Many of the playsets I got for retail, even if I'm from Romania so I was lucky. The rarest MM ones I got from a cool SirStevesGuide member and friend who passed away and his family sold them at retail and I cherish them. I also was lucky to get the ultra-rare AF Otoh Gunga and Theed Playsets at under retail in Romanian stores, I even got extras and traded/donated them 2 years ago.
The only Prequels items that I still collect are AF and MM, otherwise I'm interested just in OT Imperials. This is why I have all the TPM/AOTC AF ships and vehicles and Alphas. The Ep.1 Alpha ships are quite rare and expensive but none I got for more than $50 and some I got in trades.
The playsets are awesome, and I like the fact that MM playsets go so well with AF ones and viceversa. Even AF minifigures are ok with MM minifigures. The funny thing is that non-SW MM minifigs (Terminator, Alien or predator for example) are exactly like AF SW minifigs with all the joints and movable hands and legs.
AF Hoth, AF Yavin and AF Death Star playsets, MM Millennium Falcon playset, MM Double Takes Death Star, MM Rebel Transport playset, AF Naboo Hangar - final combat playset are really awesome. They fit AF ships and figures inside and have tons of cool features. Some are dirt cheap on ebay.