The best UG primo ever came from the guys that were producing the Thai Phoenix line for one long time source but stopped last year. They also produced the original Lyka line as well before it fell to shit in late 2006 due to the dude running things. The post 2007 Lyka product the dude carried was an in house effort that failed miserably. Which is why nowdays the mention of the word "Lyka" will either result in loud laughter from some or tears from others (who were scammed in the end). It was generally priced about $9 per ml or more depending on how many times it changed hands. So at least $36 per week was the cost for the very minimum dose of this at 400mg.
Good stuff. Worth the price? Depends. If you are cycling moderate to high doses of other compounds with an androgenic nature, then you would probably be wasting your money as you are simply not going to see any benefit primo can have in that stack as it is basically lost in the shuffle.
If you are entering the final 6-8 weeks prior to a show and are eliminating as much androgenic activity as possible to minimize any possible water retention and relying on things like anavar, winstrol, etc.. to preserve as much muscle as possible, then perhaps the cost is justified.
So it really comes down to what the goals and expectations are. After all, if you compare the $ of mg for primo vs the $ of mg for Tren Acetate that comes from labs, you will see that a 10ml bottle 100mg per ml generally costs the same. Only difference is that mg per mg y ou will definitely see more results from tren at a lower dose than you would from primo at a higher dose. Might not be the same results, but nevertheless, the average trainee will who is not contest prepping will get his money's worth better with tren than with primo.