Twice. It was good but didn't see what's so special about it.
There's a really interesting Vice video about how Abalones are being poached in South Africa to pay for Methaqualone ( Quaaludes/ Mandrax) regents from China.
I've never eaten abalone. Your question made me research some prices on same. (Fresh Abalone Steaks (16 Steaks 1LB.-Giovannis Fish Market-$150.00 + $49.95 shipping) They don't sell them locally and I doubt I will ever eat one at those prices.
I'm still trying to find a local store that sell Groupers, to no avail.