OP is correct! Always asking politely about what else they may have or is anything else for sale has rewarded me with incredible scores. Think positive and be hopeful, be smart.
One was answering an ad for a broken wood jointer, while standing in his front yard I asked if he has anything else for sale? We walked to the backyard to a free standing five car garage absolutely full of machinist tooling from McDonnell Douglas aerospace where his dad was an engineer (no cars). I went home with five station wagon loads of tools (made five trips). He was really keen on selling bulk so the price kept going down and down as the pile got bigger to almost $150/per car load. Never bought the jointer.
Another ad I responded to was for a $100 drill press and asking if he had anything else to sell after seeing some vague items in the background and ended up with this (see pic) for an extra $150 and still loving the drill press. Just two of the small Albrechts paid for everything.
All my best deals ended up by inquiring and asking politely.