I sold a train collection on consignment where the collector marked everything with current values. My dad started selling the stuff before his death, and I sold the rest.
It was a mess. The prices did not reflect his values. Some went for more, most went for less. The woman trusted my dad, and was used to the lower returns, but the trains sold for 70-80 percent of his stickers overall.
The collector also had a wall of figures - Barclay, Manoil, Britians, Grey Iron. Over 3500 pieces. The wife wouldn't do anything with them because I was telling her the return would be pennies on the dollar. She'd pick up a figure and ask me what it would sell for and I'd look it up on eBay and say $3-5. She'd say it has a tag for $25 or $30.
The stickers caused her to dither and look for other ways to sell the collection.
The wife passed about 6 years later, and the son found me through a local antique appraiser. He didn't even know I'd sold the trains for his mother. I bought the lot.
I sold 3000+ figures on eBay at opening bids of $3. Most sold in the $3-6 range. A few went for more, only a few surprised me. The stickers made it easy to list them on eBay as they cross referenced with the inventory cards so I knew the guy with the flag was a "Flag Bearer."
Speaking of the figures, ALL the ones that sold for more than $25 went to about 12 bidders. Those same bidders also bought a majority of the cheaper figures. There just aren't (or weren't in 2015) very many figure collectors buying on eBay.