I've used hundred of pots from Futurlec with only 1 or 2 failures. They are the standard 16mm posts that many builders use, so no worries there.
They also have a flat rate shipping of $4 for up to $29, so you can get 52 pots for $32.60 = .63 each
Though, as the others have said, it's a long wait for shipping. If you're in the US, it can be 2-3 weeks before they ship your order and
then another 3-4 weeks to get it. The last order I put in took nearly 2 months & they even shorted me one item. I emailed their support numerous times with no reply...so I'm done with them for now.
Tayda on the other hand is far better. The pots are .40, but the shipping is higher, but only for heavy stuff like pots. 52 will cost $37.10 = .71 each. They have excellent customer service that answers right away in good English and they now ship from the US, so I get my stuff in less than a week
have a blast