Hubs and I have been buying junk and selling antiques for 40+years with 5 brick-and-mortar stores: Big Bear Lake, CA, Austin, TX, Deadwood, SD (current store Antique Emporium For Sale), and now Goliad, Texas (as Snow-Birds).
Ebay has been part-time for over 20 years, but we've been kicking it up now that we have more leisure time. Fortunately, we still retain a lot of the info from the many years in the 'biz. We pride ourselves in the knowledge we have gained and enjoy sharing what we can.
Our store in South Dakota has 10k square feet containing many 100,000 of items, so we have a constant supply of inventory!