I would definitely say that there are public alternatives whether is identical Blackbullet config or recent free checkers out there now. The only difference is that you are paying 30$ for someone to change the API of an possible old config... Personally, this isn't a sale-trash but more like something that I am criticising on an config without a face value, which did had a huge value, before it became a popularity during it's proxyless versions. Now you need HQ Proxy and people would most likely spend 30$ to just get that instead.
Although I do wish you luck if anyone is interested, not saying that they shouldn't but you have to look out for what is already shared to the public view...
What I mean is simply you will still need HQ proxies for this config which is obvious, it isn't proxyless and it isn't worth it unless you provide something unique whether that's other configs as a package deal or proxy distribution by your self to your clients... Is up to you to be honest but if you watch Dragon's Den then you will know where I am getting at...
EDIT: In case of making this more worse, which I am trying to not spoil, I am sorry for the seller is just that I have to spit it out, you could personally hire someone to make you custom configs for 10-20$... *sigh* , just so I don't make it look like a sale trash. A good tip will be for the seller to tell their clients what are the current difficulties of making this config and what makes it uniquely experiencing in order to make this config, which answers it's price of 30$...
SPACE FOR RENTING, PM OFFERS :comfy: