Here are the specs. for the L18RNX/P which is 8 ohm while the drivers for sale are 4 ohm and IMO even if the specs. for the two drivers differ by even 10% the for sale drivers still might represent a good buy.
Aside from the good looking xmax, they don't seem all that great for IB use to me. Maybe if crossed at 80-100hz despite the low Fs. Qts is okay but suspension measures looser than I'd like to see compared to their actual car audio series (Lotus). For the money (100 for the pair? ) it's not a bad chance considering other Seas run for close to twice that price.