Hello fellow tankers,
Once again this year there are discounts for vehicles through the daily tasks (missions from Vinnie Jones). If you are already a bit advanced and no longer need a low tier tank, then you can use these discounts to earn a few extra credits. Below is a list of the tanks that brings the most profit.
Tier 2: Discount 100%; M14/41 (Italy); Cost 4´100; Profit 2´050
Tier 3: Discount 100%; M15/42 (Italy); Cost 45´400; Profit 22´700
Tier 4: Discount 100%; B1 (France); Cost 185´000; Profit 92´500
Tier 5: Discount 80%; M1 (USA); Cost 435´000; Profit 130´500
Tier 6: Discount 60%; Hellcat/o-I (US/Japan); Costs 950´000; Profit 95´000
In total you can earn 342´750 credits with little effort.
Source: https://www.reddit.com/r/WorldofTanks/comments/188c5pw/extra_credits_by_missions_from_vinnie_jones/