[isaacnnn]

What would you do in this situation?
Maybe wait a few weeks and see if the IMEI comes up as clean then sell it?

That's pointless imo. The phone can be blacklisted after a day, a week, a month or not at all.

If you aren't going to use it yourself, I would either sell it or make an In-Store SE with that phone.

Well the chances of it getting blacklisted as time goes on significantly reduces. I see the first week or so it being highly likely to get blacklisted.

For example in NZ (could't find enough info on Aus) they can only blacklist a phone within 30 days of the lost/stolen incident occurring. Hopefully it should be fine though anyway, I didn't include the serial of IMEI on the PR either.

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or make an In-Store SE with that phone.

That would be a lot of effort sealed boxing a whole new iPhone to have the exact same product but just not a potential blacklist.
Unless there was another method you were hinting at that I'm missing?