What happens if a stock is set to sell at a much lower price than a buyer is set to buy?

For example:
If person A places a limit order to buy a stock at $50 or better and person B places a limit order to sell a stock at $25 or better, what price does the transaction actually use?

Im not sure how to phrase this for google which is why Im posting this here.

It seems like you would have to give preference to the seller or buyer; or just do the average.

If I were setting it up, Id probably give the preference to the seller, but maybe its more complicated.

Some google results made it seem like the transaction would just take place and then the broker gets the $25 difference, but that makes the “or better” part of the limit order meaningless.