I believe this is the cheapest ever digital copy (even for non-deluxe version).
With the new Battle Royale Firestorm mode recently out, this will be a tempting price for many I'd say.
Keep in mind, Battlefield 1 eventually ended up constantly on sale below $10 price-point, and eventually became free in a few deals. This was in the lead-up to Battlefield V however - but for those who aren't going to play it a lot, it could be worthwhile waiting. Especially if it ends up coming out on EA Access (10 hour trial available there currently).
Good price anyway!
What’s the single player like?