Are lithium batteries worth the cost?

Just for kix I went to Amazon this morning and typed in 100ah lithium battery and just in the first two pages there was 10 Lifepo4 100ah batteries for under $500...That makes them not overly expensive anymore imho and a good reason to make the change if someone has been on the fence on going lithium..

After being on the fence myself for sometime and finally buying one and using it,I could not be more impressed..