We’re actively collecting vendor pricing for square magnets 3" x 3" 20 mil. No market data is available yet.
Submit your quoted price to help establish a benchmark.
Usually a specification or finishing difference, not the core work. Ask both vendors to quote the identical spec and the gap normally narrows.
The same product family is tracked in 2.75×1, 2×4.5. Quotes are NOT interchangeable across variants, so match the spec before comparing.