LEGO® Minifigures™ Series 1 were introduced in 2010. Collection includes: Demolition Dummy, Forestman, Cowboy, Super Wrestler, Zombie, Ninja, Cheerleader, Skater, Tribal Hunter, Circus Clown, Magician, Deep Sea Diver, Robot, Nurse, Caveman, and Spaceman.
The idea behind collectable Minifigures™ was that each minifigure come in a sealed bag, so you never knew which minifigure you might get.
Minifigure™ was sold individually in opaque polybags and came with a selection of accessories, a special display stand, and a paper checklist. It was quickly noticed that the barcodes on the back could identify the contents. The barcode was thus removed from Series 3 onwards. Many people anyway noticed that you can recognize Minifigure™ by touching bag. So, now often you can buy whole collections, those recent – relatively cheep – older ones might be expensive. LEGO® initially underestimated the demand for Minifigures™ – and thats why Series 1 remains a highly rare and valuable collection.
I bought mine in 2018 for GBP 282.61 (which was at this time US $402.65). Purchased it from vintagebricksuk Ebay shop.
Detailed information can be found on LEGO® website here.
Although released in 2010, not available any more You can still try to find them on eBay.
Some more information on this series can be found on Brickipedia.
Below you can find photos of all Minifigures in this collection:
