Not in years thank God.

Assuming your talking about selling off some excess guns? Check with the show promoters to see if "private sale" is "allowed"- by the show not your state laws, etc.

Also, a lot has changed since the 90's, no one seems to carry cash any more or bring cash for big purchases. So plan on having some alternate method to accept payment, there is all kinds of cash app, etc. type stuff for that. Or say cash only and roll with it.

Bring something to cover the table with- a black table cover will work fine. Most gunshow tables are 8' if it's a 6' table expect to pay less. Can't tell you what going rate is now but I would assume $70-100. per table at least.

Bring some food and drinks so you don't get charged $20. for some crappy hotdog and coke.