Estate sale Fuselier speakers for $370 but I know nothing about them.

Well if the OP has already purchased all 4 of the speakers he might select a pair that needs little work. Then money may have been well spent.

Fat Julian's was the only dealer I'm aware of that sold these.  I recently picked up a pair of 3-BS (model 3, bookshelf) 3 ways.  These may be earlier models, as the baffle is flat, not stepped, but the drivers and port are arranged mirror imaged.  And they sound excellent.  I knew nothing about them when I first purchased them with a pile of other gear, but a bit of research and I soon realized these were in the same league as Thiels.  Buy them, fix them as needed, and enjoy!

 The woofers in the 3/3.3’s were Vifa. Tweeters were Audax. The midrange changed several times as the model evolved but the model 3 may have started as an Audax. The model 3.3 used a Peerless midrange.The final iteration, the model 5, used a Dynaudio midrange and was an excellent speaker. I started with the original model 3 and upgraded as John continued to make improvements. 

I bought my 3.3’s at Sound By Singer in NYC, not sure if they sold any other of John’s designs.

Hey all - thanks for the responses. As you know already, I did purchase them. I'm currently on the lookout for an amplifier/integrated amplifier to power them. Would anyone know any information such as the Power output, Power handling, RMS, Peak, Maximum output, maximum input power, etc so I know what amp is best to power them? Thanks. 

(also, I know they are likely not playable at the moment, but I am looking into fixing them either with a service or over time by myself. Thanks)