Sweeper Vac is/was its own company. I have a little hand vac from them. This one is likely late 1920s or early 30s. It looks mostly complete, but it's hard to tell the condition of the details, like the bag, wheels, rubber parts, etc from the pics. The handle seems to be missing a cap or rubber grip.
Agreed with Les, it's less than $50. It seems quite a few people join up here to ask for a value for an old machine, and are either disappointed that they don't have a gold mine, or just choose not to believe us and go ahead and try to sell a machine for an exorbitant price.
A piece of advice: orienting the bag and cord properly will make it look like it's in one piece. It kinda looks like it's falling apart in these pics. Also, don't run it much, the bearings are probably dry, and it'll need some attention before it can be used without destroying it.