I got the Hidden Hitch round tube, Class III at a local trailer/van/trucking supply store for $110. Drawtites were about the same. I just opened the yellow pages and looked under trailer parts, then called around. The three shops were all within about $10, and they take care of the shipping! The $150 installed price sounds pretty good, esp. if it includes the wiring harness, which is an extra $25 or so.
good luck,
Greg
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gbaxley
'01 TW EX