Are there some practical conclusions from game theory analysis of bidding strategies in english auctions?

I’m trying to learn about bidding strategies for a standard public english auction. I was googling around for info on this to see if there were some practical suggestions from game theroy analysis, but it all seemed very academic with very little in the way of practical strategies for when to jump bid, how much the jump bid should be for (maybe expressed as a multiple of the minimum bidding increment), the timing of when it’s appropriate to initiate a jump bid etc.

I would think there these tactics would be fairly easy to test experimentally to determine which ones yield the optimal outcome for the bidder (winning the auction for the lowest possible price, and not exceeding the item’s actual value).

Can anyone point me to some good resources on this topic that don’t require a PhD in mathematics or microeconomics to wrap my head around? I’m just looking for an evidence-backed (mathmatically sound) strategies and tips for how to win english auctions so I can help my girlfriend get a car at the local car auction.

She’s been to the local auto auction for several weeks now with no luck, and is somewhat savvy about how much the cars are worth, and has been outbid on every car thus far. Every car she has previously owned has come from auctions in the past, and for many years her father and her have been able to grab up bargains, drive them for months/years and then re-sell them (often for more than they initially paid). I say this just to point out that she’s not new to auctions, but I suspect that she may not have the best bidding tactics (simply incrementing the bid by the minimum required bid and eventually dropping out when it get’s above what she wants to pay).

Any advice, or articles/resources you could point me to so I can do some research would be greatly appreciated.