I would not pay more than $300 for a Rolleicord V in perfect working condition, i.e., CLAed by a someone serious.
If we look the opposite way, $300 - $165 CLA = $135 on Ebay. This is roughly whay I paid for mine. In your case, we end up slightly over $400.
$165 to fix the slow speeds seems to me a little overpriced. Try to get a quotation from Mark Hansen. The guy is sometimes rude but he knows a lot about shutters. He worked on my Cord years ago and it works perfectly since then.
Hope it helps!