Book Fair Table, some questions

I appreciate Thomas’ insights on this, like this post from 2020.

Any additional insights are highly coveted.

Questions I still have:

How do I know my price point for a live table event? The books cost me from $5 to $7, so do I just arbitrarily add, say, $10 onto that?

Cashless transactions/tools…has any one product come out on top between Square, Venmo, etc. for event sales like this? (I’m really rusty on this, but I know fewer/fewer people carry cash anymore)

Can I incorporate my book launch into a book fair, so that I can reach more people at once? I don’t think it violates the event’s rules, but is it bad form? Will the other authors appreciate or resent this? (My SBDC person suggests I crank out press releases and contact influencers and get lots of buzz for my launching book, and oh, by the way, it’s at this event, too.)

Thanks for the help, everyone. (I dunno why I’m so anxious about this!)

MLJ