Hey Roger, welcome to the community...
online purchases...well over 100,,,, of those, only 2 ended badly for me...both times, seller would accept a return but postage was on me. Both times the wood was NOT as advertised, both times with undisclosed defects. Mostly its been smallish boards used for trim or accent work. Only a few times were the orders more than 20bf. So all in all I have had pretty good luck buying online.
Sheet goods online are usually cost prohibitive unless not available within a 100 mile radius. I found a BB source and keep him busy. Usually try to keep onhand:
2: 1/2 and
"..... limited only by imagination"
"Just smile and wave boys, smile and wave"
Skipper the Penguin