Bira Craft 2 Magnets for Easy Stamp Platform Tool for Accurate Craft Stamping

Don’t have a lot of money. What platform is as good or close to mini misti, but cheaper in price? Don’t want to only use it once.Thank you very much.

Can you buy extra magnets?

Do these magnets work on the Tim Holtz stamping platform?

Would this work for my scrapbooking, 12X12 paper?