If their market is wholesalers, they probably have a sales team, and the goal here is to build their Leads list.
I know what you're saying, but I've been here before. Few years back. Company sold customized silicone products (ipod slips, bracelets, keychains, etc). The owner wanted it setup with a small form (like that one) before you saw pricing.
His argument was that people that clicked on pricing but wouldn't fill a small form wouldn't have bought anyway.
I argued against it. I was young. It was 2004 or so, so I had been developing software professionally for 2 years.
He agreed to an experiment. I devised my own little Google Website Optimizer. We showed three things: 1) Status Quo 2) a "No Thanks" button beside the "Submit" button and 3) Skipped form entirely.
Long short, he was right. Removing the form didn't increase sales over 3 months, not at all. And it arguably hurt things because we had less sales data about prospects.