would they still be okay to buy would they survive all the way until harvest?
I have yet to experience my first grow; however since my orders are almost complete, and I've been reading and studying alot of opinionated viewpoints on growing, I would say its better to delegate that question to a higher rep user who has grows under their belt.
The bit of info I typed was actually from another thread where as the above post pointed out was in different stage of growth. In my personal opinion since both above rep'd users gave you nitrogen deficiency, I would assume an experienced grower would know how to reverse or atleast control the damage from such a deficiency, I guess your next question should be how big of a deal is 20$ to you? Lol, you may need to buy some high nitrogen fertilizer, but I wouldn't recommend doing that unless one of the above repd posters actually chimed in that the plant was worth saving.