Sneakers have an unusually wide price range for the same model, and that is the thing to work with rather than against.
Why a low start works here
The audience for a specific model and size is small and specific. A low start brings them in; a high one makes them wait to see whether anybody else bids, and if nobody does, nobody does.
Where a reserve belongs
On a pair with a real floor — something you paid a lot for, or a size that will find its buyer eventually. Set the floor as a reserve rather than as a starting price, so the room still gets to find the number above it.
How reserves work: hidden, with buyers shown only whether it has been met.
What moves the price
Size rarity, more than people expect. The common sizes have the most buyers and the most competition; the extremes have fewer buyers but less supply.
Condition, steeply. The gap between deadstock and worn-twice is larger than the gap between worn-twice and worn-often.
The box. For an unworn pair it is part of the item.
Pacing a show
Do not auction five similar pairs in a row. The room's attention and its money are both finite, and the fifth pair of the same thing sells for noticeably less than the first. Managing stock.
Questions people ask
What if it sells below what I paid?
That is what a reserve prevents. Starting high instead is how an item gets no bids.
Should I price by what the resale sites say?
As a reference, not a rule. Those are asking prices; a room is a selling price.
Can I relist if it does not sell?
Yes — change the start price before you do.