Two reasons to get the current Woot refurb iPad 6 deal rather than this iPad 5…
The price step is a small $20 to get the iPad 6. $200/240 (32GB/128GB) vs $180/220 here.
iPadOS 15 arrives in a month or so. iPadOS 15 will likely be the last OS upgrade to be offered to the iPad 5. The iPad 4 will not get iPadOS 15. No guarantees, but the iPad 6 has a much better chance of seeing iPadOS 16.