I've used Hibid quite a few times, and it's the best and most navigable platform for online bidding. 10/10 would recommend.
I set up an account to bid on an auction around the corner - looking for collectibles. I found my way to a few more not as close (make sure you filter for auctions that ship!) and found more of what I was looking for. The experience was good and I would recommend checking it out.
Just look for an auction, click on the available lots for sale, and start looking for what you're interested in, place your bid, or you can set your bid to the highest you're willing to go, then sit back and watch the bidding. Picking up your goods is easy too.