[Expresso]

Is retrofitting soft close system onto existing kitchen cabinets and drawers a possibility?

And does anyone know what the approximate costs would be? Could a total noob do this DIY?

[Matlock]

Yep.
I've seen these little springy knob things that you drill and insert.
No idea where the cabinet men get their supplies from.

[B!tch]

http://www.leevalley.com/en/hardware/page.aspx?p=65483&cat=3,41399,46645

Door Damper - Lee Valley Tools (http://www.leevalley.com/en/hardware/page.aspx?p=46477&cat=3,41305,41294)

Blumotion for Doors - Lee Valley Tools (http://www.leevalley.com/en/hardware/page.aspx?p=55208&cat=3,40921,41241,55420,55559,55208)

[sleepywheel]

Try these for doors and drawers. I'd prefer the ones that replace one of the hinges on each door, I think they're available at Home Depot. I find these are sleeve catchers when you reach into the cabinet.

RATIONELL Drawer damper - IKEA (http://www.ikea.com/ca/en/catalog/products/60108677/)

RATIONELL Door damper - IKEA (http://www.ikea.com/ca/en/catalog/products/60159704/)

[Gridlock]

Windsor plywood has a good selection of european hinges. They also gives discounts on volume.

[Selanne_200]

Thumbs up for blum blumotion soft close hinges