But be warned! On Ebay bagpipes are often misrepresented by ignorant sellers. Recently a horrid Pakistani set that happened to have a vintage Scottish-made chanter stuck in it was being sold as if the entire instrument was by that Scottish maker. This happens all the time.
Unfortuately most Scottish makers didn’t stamp their names on their drones, only on their chanters, so most drones must be identified by their appearance. It takes an experienced eye to tell what make these anonymous old pipes are. Oftentimes experienced pipers can tell that a set is a quality old Scottish-made set, and have a fair idea of the time period it was made in, but still be unsure as to the specific maker.
So, get friendly with an experienced piper who is also experienced at vintage pipe identification. Many quite good pipers are clueless about identifying old pipes. If in doubt, post photos of the bagpipe in question here or on bobdunsire and knowlegable people will chime in.
Great makers c1900 include Henderson, Lawrie, Glen, Center, MacDougall, Starck, MacRae, etc. Good Scottish makers from the mid 20th century include Hardie, Sinclair, Grainger & Campbell, Gillanders & MacLeod, etc.
The other real bargain are second-hand sets by current good makers like MacLellan, Gibson, Kron (in the USA), Dunbar and Walsh (Canada), Naill (England), and all the Scottish makers. Scottish makers range from a large factory-shop using a combination of CNC machine turning and hand turning like McCallum to small one-man operations where everything is done by one guy by hand like Doug MacPherson, Tim Gellaitry, Blue MacMurchie, Alister Fletcher, Duncan Soutar, Ian Murray, etc. Other Scottish makers include St Kilda/new Hardie/new Henderson, Booth, Dunfion, Shepherd, Strathmore, etc.
There are sets by these fine craftsmen on Ebay fairly regularly, going for astonishingly low prices like $500 etc.
If a set lacks a chanter you can get a very nice used chanter by Warnoc, McCallum, etc for well under $200.