If you have a local option that can build wheels for a reasonable price, I'd recommend having them built. The quality level will be way higher than mass-market $150 wheels.
If you want Open Pros, expect to pay about $140 just for the rims alone -- Sun's CR-18 is the de facto rim of choice for the C&V forum. They're much less expensive than Open Pros, but nice enough that BianchiGirl put some on her Hetchins.
I still doubt you can pay to have them built for under $150 outlay, but you'd be in the ballpark and still have nicer wheels than the $150 prebuilts. (Full disclosure: I built my own wheels, and am biased toward the perception of improved quality from handbuilt wheels.)