http://onipage5fcvzmxbdnnc4bboumv7x7ep72hikokoi2arsvoewn4wjqiqd.onion
The Copy button on each listing hands you the exact onion string every time, so use it. Paste the address straight into the Tor Browser, wait for the market to answer, and complete any challenge page that appears. When it comes to money, fund in Monero. Bitcoin still works on some markets but is de-emphasised for a simple reason: the Bitcoin ledger is public and routinely analysed, while Monero's is not in any practical sense.