Automated bidding (sniping) has absolutely zero effect on the way that I bid. If you bid up to your limit, then it doesn't matter how fast someone else outbids you. They've outbid your highest offer. They were willing to pay more than you were. Game over, try again tomorrow.
I don't win everything that I bid on. But I don't overpay for what I do win, either. Many times, I'm pleasantly surprised to get a bargain.
This pretty well sums it up for me. Sniping isn't any kind of an edge, since so many are doing it. Sniping software will go as high as the user allows, so if you're outbid by a bot it's because that user was willing to go higher than you were. I decide what an item is worth to me and that's my limit, no more. If I win, great, and if I lose, oh well, there's always more.
And I've seen numerous sniping disasters over the years where the users have set a ridiculously high limit and collided in the stratosphere, paying as much as 10 times the market value for a dingus. Highly entertaining.
I look for things on eBay because I don't find them elsewhere. Otherwise I wouldn't bother.
You may get a great deal every now and then, but that's not what eBay is about. eBay pitches itself as the place to get the steal deals in order to bring in the suckers. If that myth was universally true, no one would be selling on eBay. It comes down to who's looking on any given day, and how well the item is presented.
I've found some great deals on eBay, though not nearly so much in recent years since they've improved their cross checking interface. And I've bought some of my best pieces from other collectors, or private dealers.
Know what market values are for what you're bidding on and stick with that. Eventually you'll have some success. And, as others have suggested, look at the online dealers, and at pipe shows. I've found better deals at pipe shows than eBay.