@308fan here is my wishy-washy opinion. Tesa is unlike many other peptides in that it takes 8 weeks before it starts to show any obvious results and to do it "correctly" you should think about a 2mg/day session lasting as long as 26 weeks (according to some, ideally).
If the tesa you want to purchase is priced correctly and it works, the kit will be a great start to knocking down that first 8 weeks of no obvious results. However, if its a dud, you wasted all that time. Moreover, you wont even know it because it was just one kit. TSM is really cheap in the grey market in the here-in forum vendors list compared to the USA market and Insta / YouTube sellers. Yet, its still an investment of both time and money.
Here is how to eval cost/benefit: Tesamorelin from vendors listed on this forum as of my looking today (with shipping added into the equation) is about $1.80 per 1 MG (about $25 per week because you take 2mg). Additionally you are going to want to get a few GH blood work labs done to make sure you aren't over-doing it.
I'm "all-in" and haven't cleared the first block of 8 weeks. I'm already about to purchase more kits. I would be a definite "No way" on the mystery kit, because its a long wait to see the benefit.