I can vouch for https://sales.hashexpert.net/ - I have purchased >100 units from them over the past 4 years, with no problems whatsoever.

You will need to contact to get an up to date price, however the current prices on their website are not far out, so will give you a good idea.

I have also purchased directly from Bitmain a few times, every time there were problems, including a 'spot' order (meaning the items are in stock) taking over 3 months to ship. Bitmain are diabolical, horrible to deal with. If you're buying just one or two miners, I'd save for something better like a Whatsminer