how about threefifty (ok, maybe 3.75) https://www.ebay.com/itm/JOHNSON-RS...443191&hash=item3d5134be03:g:pRgAAOSwaEhZJToE
Active Surplus on Queen St. ,Toronto, sells 380 brushed motors for $1ea (Cdn) the last time I was there.
I didn't mean to get your hopes up with the great discount motors. Last time I was there I bought 20 motors so I had stock, which are now installed in combat and non-combat ships. I see now they closed their doors, and I'll be looking for a new source. Mark