Is ACME the joint near a hospital in Casselberry going toward Oveido? If so, I got G1 Snaptrap there, sans accessories, for $5. Shell with it.
If not, the place I'm thinking of has row after row of toys, floor to ceiling. The X-formers are in the back kinda near the comix. Next time I go to my sis in Oveido, I'll check it out.
Other than that, I hit up Big Lots, Family Dollar, Dollar General, Bealls, and random discount store about once a month.
Also, I go to Flea Markets and yard sales pretty frequently on the weekends. It's hit or miss, but when you score a G1 for cheap, it rox!
However, most of my toys come from eBay. You gotta be smart about it, but I'm a G1'r so there are few alternatives.