What sort of answer are you expecting? Check Amazon, or completed listings on eBay, or your local vendors. Or consider getting a refurbished unit from Nintendo directly.
The New 2DS XL is probably going to be the cheapest option for new units, but by all accounts they have considerably lower build quality compared to the New 3DS XL. Whether that is worth the savings is entirely up to you.
If you are concerned about CFW, then every unit is pretty much just as easy to hack as any other unit.