I've placed several orders at Wholesale Art Supply Co - they're at
http://www.wholesaleart.com/ - I'm mainly watercolor and pastel, so I couldn't
vouch for their stock of acrylics, but they seem to have most everything.
They seem to have pretty good prices, as well, and of course, the larger the
quantity, the larger your discount. (This makes me tend to overbuy on 'staples'
like watercolor paper, but I figure I'll use it all eventually.)
I'd be interested in finding other shop-online sites, myself, just to do some
comparison shopping. -- Jane, waiting for her latest order. (A new palette! some
new colors!)