If you're a beginner and not experienced building flying models, it's in your best interests to buy ARFs from the better known retailers.

Their ARFs are more apt to have been built with all the critical joints glued. They're more apt to have adequate materials where needed.

Saving $20 on a model is false economy if the sucker blows it's tail off on the 3rd flight, or it's wing pulls out because the structure was some unknown soft wood instead of liteply, or the wingpins weren't glued in. Or the cabanes didn't have a crossbrace.