Here is a collection of what I have purchased for my craft fair, plus other ideas that I think are cool.
This is the tent I have used for years. It has everything you need and is on wheels! #affiliate link
ABCCANOPY 10x10 Pop Up Canopy Tent White
Since I sell books and these were less than $20 at the time, I purchased a bunch of these. #affiliate link
Fox Claw Wood Tilting Bookcase - White
This is what I use for my price tags. I clip one on each book. #affiliate link
Crafter's Square Chalkboard Tag Clothespins, 4-ct. Packs
I have 8' tables because you don't always have a 10'x10' space. Make sure you get one with a handle! #affiliate link
8FT Folding Table Camping Table Plastic Foldable Table Picnic Table for Outdoor Office Parties Camping,29" D x 94" W x 29" H - Walmart.com
This is where I purchased my sign. Get yourself a vinyl banner to hang at the back of your booth with your company logo and information. Make sure you get one with grommets! #affiliate link
A custom tablecloth with a pop of color will brighten up your booth. #affiliate link
Custom Tablecloths, Fitted Tablecloths with Logo | VistaPrint
If you are standing all day, you definitely need an anti-fatigue mat! Just buy one of the cheap kitchen ones. #affiliate link
Kitchen Mats for Floor, Anti Fatigue Kitchen Floor Mat, Non-Skid Waterproof Kitchen Mats and Rugs, Comfort Standing Desk Mat, Memory Foam Mat for Home Office Sink Kitchen Rugs - Walmart.com
Your chair should be high so that you can look alert for your customers. Mine has a drink holder so I remember to stay hydrated. #affiliate link
EVER ADVANCED 30.7" Tall Folding Chair
Because if I'm doing a craft fair I MUST have my caffeine! #affiliate link
The Tea Spot 22oz Tea Tumbler & Thermos
Remember to stay hydrated! #affiliate link
Huron 16oz Vacuum-Insulated Travel Mug
Don't forget business cards! Vistaprint is the cheapest place I have found to get your cards printed. #affiliate link
Custom Matte Finish Business Cards | VistaPrint
Make sure whatever you buy folds up and will fit in your vehicle! #affiliate link
Yu Shan CO USA Ltd 330-25 3 Tier Folding Bookcase Honey Oak
An inexpensive way to cover your tables vs. an expensive tablecloth!
9 x 12 Canvas Drop Cloth
Easily add more light to your booth; shine one on your high $ items!
Mainstays 5" Metallic Black Adjustable Mini Clip Lamp, with LED Bulb Included
This is a cheap way to elevate your table!
Mainstays Black Bed Risers, Raise Your Bed to Create Storage Space, 4 Pack, Assembled Length 6.50 in x Width 6.50 in x Height 6 in