...it appears that there's no difference between the BTC edition of Flex and the normal one [apart from its color (SMH)]!
To be honest, that's not unusual. Let's not forget that Trezor had a limited edition Bitcoin-only version of their hardware wallet not that long ago. The difference between that model and the others were in the orange bitcoin cover. However, you can install a bitcoin-only firmware on a Trezor regardless of which model you purchase.
On a side note, you could build DIY Jade (based on Blockstream Jade[2]) which cost less[3] if you don't mind less feature.
Even a fully assembled Jade is affordable and costs less than $60 with a discount code. But I understand the logic in purchasing the parts yourself and building everything from scratch.
After the Recover debacle, there were still so many people who just shrugged their shoulders and kept using their wallets.
If that waiting list is to be believed, then my point is proved.
I am sure that 2/10 people who are on that waiting list have an idea of what you are talking about when you say Ledger Recover debacle. Even less would be able to explain what Ledger Recover does. What they know is that it's this cool new thing that Ledger created for us and they said it's super safe.
i know it's not recommended but i was looking at ledgers on ebay. but they claimed they were "new".
Never buy hardware wallets on eBay, new or second-hand. Visit the official shop or use an official reseller for such devices. Trying to save a few bucks only to risk getting a faulty or manipulated HW isn't worth it.