What was the first thing you bought online?
Access.
I remember renewing our memberships to the dial up BBS, on the BBS, and typing in the checking account number.
That was probably in the early to mid- 1990s, they couldn't do online transactions before that, and the BBS told everybody to check with our bank to make sure THEY could do it. Fortunately, we used the same bank, so it was no problem.