I am a beginner in here. I love stove.. really want to buy one or two.. or.... more the stove... anyone can help me (till now I only can find some stove on Ebay)
ebay might be your best bet. Otherwise local markets and anywhere else that people sell stuff. You never know where a stove will turn up. I have one rescued from a scap metal recycler. It was about to be melted down
What type of stove are you after? There is the UK ebay where you find a lot of difrent stoves www.ebay.co.uk. And there is the german market on ebay which is www.ebay.de, here you can find a lot of german and european brands like Phobeus, Enders, Primus, Optimus and a lot of russian stoves which usually are unused av very nice.
Local Thrift stoves; your equivalent of Craiglist, Kijiji, etc; ebay France / Germany / Austria / Australia / New Zealand / etc; other countries various auction sites (non-ebay - Google them to find 'em); ask your family/friends to keep an eye out; flea markets; physically attend local auctions in your area or contact the owners and tell them what you're looking for; church sales; swap meets; ask other sellers/collectors/users/pickers where they get their stoves; military surplus; Google the name of your stove and checking the results may lead to more sites/options/ideas; metal recycle depots; sporting good stores; etc etc. Some (many?) won't share their sites or provide specifics because they see it as a competitive business/activity, so good luck and happy hunting. Also don't take it as gospel everything your read/hear regarding the seller's item, whether it be the condition, its source, model, description, etc. Many honestly may not know (history/function/etc) and others mislead - so as in everything else do your due diligence and always ask questions.
From what I've seen, Taiwan is a very fertile hunting ground for stoves of all kinds! It was fun to visit, too! I was there B.S. (Before stoves)