That model is the 515. I know the 500 series had a Bumblebee color scheme back of black and yellow. I don't know if perhaps the 515 had a primarily black bag with red trim. Though really any of their bags would work on and still look nice.
Hand vacs of this style appear all of the time in various thrift stores for around $5-$10 usually. It's cheaper to get one of those units and rob parts off of one rather than to buy individual parts on eBay or from another shop.
For your own personal usage and collection it's a nice machine to have. They do a good job of cleaning actually. Nice to use for stairs, car cleanups, quick pickups, upholstery. You can do the main carpeted step with the hand vac and then do edges with crevice tool from another vacuum.
There was an adapter available years ago which would convert the machine to be able to use Type G Dirt Devil disposable bags.
For a resale aspect, I can't say that it will be worth your efforts financially!! Even getting $20 for this might be hard and considering you can find these hand vacs all of time at various thrift stores, they are just not rare at all.
