The Phantom Menace Review2009

Plinkett:
This also leads me to believe that Qui-Gon Jinn is incredibly stupid. He coulda just went to another junk dealer and used his Jedi mind trick to swap out the Republic credits for money that Watto would take. In fact, when they arrive in town, he says:

Qui-Gon Jinn:
We'll try one of the smaller dealers.

Plinkett:
Smaller dealers? Well that implies there's larger ones. Watto tells him he's the only guy in town who's got the part.

Watto:
And no one ELSE has a T-327 hyperdrive, I promise ya that!

Plinkett:
Now either Watto is using an older-than-dirt sales tactic, or Qui-Gon can really pick out which shop to go to randomly. Oh wait, I guess Midichloreans told him where to go so they could find the boy.