Tripods are much easier to buy used as it's relatively easy to check for damages.
As for brands, there is no restrictions when it comes to brands. Get one that fits your needs and budget. Some of the more popular brands includes Manfrotto, Slik, Velbon etc. Prices starts from as little as S$30 to S$1500. Most entry level tripods will include a 3 way pan head whilst for professional series, the head will have to be purchased separately.
Cheers,
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