I am a British wildlife rescuer and zoo keeper therefore my play time depends on my shifts but pop me a message and ill respond ASAP.
I am buying bones,blood,dna and potatoes!
After 3 years of searching i have found the answer:
Patience....
I saved event items and other items i bought for cheap from like 2years ago, and now as i checked there prices, hardly any were in shops therefore i control the price! So i place a few in my shop for $500000 and auctioned the rest for 1mil+ and now u have $$$$$$