Well,
It's definitely more expesive than bulk Acetyl L-Carnitine, which works also as a neuro stimulant.
Either way, I tried all forms of carnitine. (Liquid, tartarate, propionyl, acetyl...)
I like Acetyl the best for sure. You can buy 1kg for 45 here.
Can't beat that price. I use it pre workout and post workout (about 3-5 grams each time) and in the morning before running and my energy levels have increased for sure. I did not see much difference from the liquid version, so I would recommend to get the bulk powder and add it to your preworkout shake.