A few comments.
1. G Willie is absolutely correct that this is not the FAI model. The FAI does not have the flutes on the case. The engine in question is the second gen Fox .049, just as Willie states. (The FAI venturi stack may be a bit higher, but I am not certain of this; don't have an FAI at the moment).
2. $182.50 is All The Money In The World for a second gen Fox .049. Note that your Hmb & Obnt Serv bid on it when it still was at a "reasonable" level.
3. Henry Werner's Va company is a great supporter of CL. Super guy, and highest marks possible for exemplary sales and service. I don't know if Henry sells the second gen one, but it really doesn't matter.
4. Peter Chinn's Engine reviews in early '60s Model Airplane News showed about a 500 rpm advantage with the second gen one. I have about 9 first and second gen Foxes altogether, and maybe the second one indeed is a little hotter. This rpm advantage lies within the noise level (pun fully intended) of reasonable, statistical confidence levels, so it doesn't really matter. In the Musciano Proto Speed event, wt and drag of the model will overwhelm a few 100 rpms. And we are talking maybe two clicks of the needle, too. Another noise level where luck may play a part.
Another thing: the second 049s like to run backwards even worse than a Cox reed. They are very aggressively timed. The first ones are not completely innocent in this regard, either. Of course, you can use starters for NVCL Musciano Speed, but I don't like to. But you can use more head gaskets, and generally play around with it.
I love these little Foxes, but not $182.50 worth of affection. You can find them at swaps all day for about $35. Or, from the casual, just-want-to-get-rid-of-it vendor who really likes Cox Tee Dees and Norvels (and "more collectible" Atwoods, K & B Sky Furies), a lot less.