you really are a tad delusional. this vacuum is NOT sought after but by a very small niche of vacuum collectors. if you think a starting bid of $700 will get a purchase, youre going to be relisting it for a LONG time. very high priced selling vacuums usually start at very low bids. EXPECTING a price what you impulse bought and now regret doing is very presumptuous that others will do the same.
i can tell you really dont understand how "antique" selling and apprisals work. just because you think its "worth" something, doesnt mean anyone else does or even cares. ive had offers for $1000 for my 1931 scott fetzer sanitation system ive restored. and its 100% original and works just fine.
unless you have OFFERS from collectors wanting to pay that much, thinking thats what you will GET is foolhardy. ive watched prices for rare vacuums on ebay for several years and tracked trends of what sells and what doesnt. the MEAN price ive seen NIB bison's sell for is between $300 and $400. only twice have i seen them listed higher, and only one sold for about $600. if ANY parts are damaged, broken or missing, you price to sell will be cut in half at best.
dont require someone to pay what you did because you made a poor financial choice. list it STARTING at $99.99 with NO RESERVE and be happy with what you get.