So Ive spend 30 days of playing this game in order to acqire tier 9 premium light tank ZTQ-15. At the end I had 84 parts collected. Now AW is selling parts, so I thought I will give it a go...
It took 47€ to get those last 16 remaining parts in my case
24.75€ for 10 parts
11.88€ for 5 parts
At this point I was missing only 1 remaining part 99/100
5€ for 0 parts
5€ for 3 parts
In total 18 parts for 47€
So in reality it could take 250€ to collect 100 parts :)
This was the last time ever Ive spend money for MAIL.ru