I picked up Luke's Landspeeder for myself and Rey's speeder for our daughter (for Christmas), and I think they are very well done. Obviously it would have been better to wait with the discounts, but oh well. Honestly these aren't really around here much. Target hasn't had these since the opening weekend, same for TRU, and I haven't really visited Wal-Mart for awhile.
I'd like to see more as well, like the ones you mentioned, and I even sort of held out hope for something like the Falcon cockpit, sort of like we saw once in Hot Toys (at least as a prototype). "Part" of a ship might be a tough sell though.