I recently bought a hard drive with all the software installed on eBay then placed it in my Lenovo laptop and also bought the SD C4 separately off a Chinese version of eBay like store.
Xentry is good for diagnosis and testing elements of the control units in the car, developer mode in the latest Xentry requires online login, I found Vediamo more efficient to what I wanted to do like Activate Car Play, enable engineering mode, VIM, disable seat belt noise etc. Xentry needed online login which I didn't have of course.
All depends what you want to do with it. Vediamo is very very dangerous if you do not know what your doing.
I paid £70 for the HDD and £320 for the Star C4 incl cables. Laptop I already had. (I got lucky with no custom charges)