I believe the background. My car was a dealership demo, which was basically never used in 2009-2010 (it had 10000km when it was sold in 2010 March!) due to much same reasons: massive recession in Baltics. Currently I have 40000km. On a 2007.
In Latvia they had the mother of recessions, with GDP down 30% or so (peak to trough). So most likely someone bought and said no thanks, my construction business went belly up and you can keep the car. Lot of finns swooped in and bought these at bargain prices (say 12000 EUR for 18000 EUR)
I'm sure it didn't cost you much, so you got very good base to mod it.
Looks like you had a good start already.
PS: a while back I asked on this forum if the 122s would fit on E90 without causing issues, and you actually have them on. Do you have few pics in winter mode? Very curious to see how it came out, as I never got them myself.