I need help with this trade.

His:
Full Theater Set

For my:

Stitch Box
Gold Snowman
Two Gold PhilharMagic Chairs


Who's getting the better deal?

You're getting the shaft on this one. The Stitch trunk alone is worth way more than the theater set.

I've not seen many trading a theater set for just a stitch box - Personally I think the stitch is better and theater will do nothing but come down in value.