We haven't done a garage sale in years -- I should have asked my Nana, she spends almost every saturday all summer out at them with her SIL.

Last time we did ours, we bought some of those coloured dot stickers from the office store, and did things in batches with a price sheets posted around indicating what color was what price ...

so anything with a blue sticker is $1, anything with a red is $2, etc. -- good for bulk items like books, or things that you want to price all the same. Big things like tools or things that are worth more got an individual price sticker on them

Good luck with your sale!