Felt like building up a new ride so decided to try out this 650b thing. I've listed parts below, the price and where I purchased to give people an idea of what it costs to build one yourself. There were a few things I used from the old bike (handlebars, grips, brakes, pedals). Couple of things to tidy up, the brake line routing to the rear, shorten the brake lines and probably move the stem up a little.
Frame - Santa Cruz Bronson Carbon (Large) - $3280 - For the riders
Rear shock - Fox Float CTD Evolution
Front shock/fork - Rockshox Pike 2014 27.5 Solo Air Tapered Black 150 - $1004.22 - mountainbikesdirect
Handlebars - Easton Haven (spare)
Stem - Kore Repute 50mm - $64.99 - CRC
Headset - Gravity DX Pro - $80.49 - CRC
Grips - ODI Rogue (spare)
Saddle - WTB something (spare)
Seatpost - Easton EA50 - $27.87 - Wiggle
Front brake - Shimano XT (spare)
Rear brake - Shimano XT (spare)
Cranks - Shimano SLX M675 10 Speed Double 38.24t, 175mm - $148.99 - CRC
Chainguide -
Chain - Shimano XT HG95 10 - $33.99 - CRC
Pedals - V12 (spare)
Front derailleur - Shimano XT M786 Conventional 2x10 Front Mech - $34.49 - CRC
Rear derailleur - Shimano XT M786 Shadow+ 10 Speed Rear Mech - $77.99 - CRC
Shifters - Shimano XT M780 10 Speed Trigger Shifter (Pair) - $96.49 - CRC
Cassette - Shimano Deore XT CS-M771 Bicycle Cassette 10-Speed (11-36) - $89.99 - Pushys
Wheels - Hope Hoops Pro2 Evo 650b Wheelset Arch EX - $550.11 - Wiggle
Tyres - Maxxis High Roller II 27.5x2.30 (650B) EXO TR (x2) - $69.98 - Pushys
Tubes - none
Total weight - unknown
Misc
Front rotor: Shimano XT-Saint RT86 Ice-Tech 6-Bolt Disc Rotor 203mm - $51.49 - CRC
Rear rotor: Shimano XT-Saint RT86 Ice-Tech 6-Bolt Disc Rotor 180mm - $43.99 - CRC
Front brake mount: Shimano Mount Adaptor Front Post to Post 203mm - $12.49 - CRC
Rear brake mount: Shimano SM-MA-R180-P/S Disc Mount Adapter - $28.90 ($10 shipping) - TBSM
Spacers: Hope Space Doctor Spacers Pack - $12.49 - CRC
Wheel conversion kit: Hope Pro 2 Evo MTB Rear Wheel Axle Conversion Kit X12 Thru Kit - $17.49 - Wiggle
Tubeless valves: Stan's NoTubes 35mm U-boatniversal Valve- $16.99 - Pushys
Tubeless rim tape: Stan's NoTubes Rim Tape 25mm - $22.99 ($10 shipping) - Pushys
Tubeless sealant: Stan's NoTubes Tyre Sealant Pint 16oz - $17.99 - Pushys
Spare tubes: Maxxis Welterweight 27.5 x 2.20/2.50 (650b) French/Presta Valve MTB Tube x 2 - $11.58 ($10 shipping) - Pushys
Lube: Rock "N" Roll Extreme 16oz Bicycle Lubricant Kit - $18.99 - Pushys
Frame - Santa Cruz Bronson Carbon (Large) - $3280 - For the riders
Rear shock - Fox Float CTD Evolution
Front shock/fork - Rockshox Pike 2014 27.5 Solo Air Tapered Black 150 - $1004.22 - mountainbikesdirect
Handlebars - Easton Haven (spare)
Stem - Kore Repute 50mm - $64.99 - CRC
Headset - Gravity DX Pro - $80.49 - CRC
Grips - ODI Rogue (spare)
Saddle - WTB something (spare)
Seatpost - Easton EA50 - $27.87 - Wiggle
Front brake - Shimano XT (spare)
Rear brake - Shimano XT (spare)
Cranks - Shimano SLX M675 10 Speed Double 38.24t, 175mm - $148.99 - CRC
Chainguide -
Chain - Shimano XT HG95 10 - $33.99 - CRC
Pedals - V12 (spare)
Front derailleur - Shimano XT M786 Conventional 2x10 Front Mech - $34.49 - CRC
Rear derailleur - Shimano XT M786 Shadow+ 10 Speed Rear Mech - $77.99 - CRC
Shifters - Shimano XT M780 10 Speed Trigger Shifter (Pair) - $96.49 - CRC
Cassette - Shimano Deore XT CS-M771 Bicycle Cassette 10-Speed (11-36) - $89.99 - Pushys
Wheels - Hope Hoops Pro2 Evo 650b Wheelset Arch EX - $550.11 - Wiggle
Tyres - Maxxis High Roller II 27.5x2.30 (650B) EXO TR (x2) - $69.98 - Pushys
Tubes - none
Total weight - unknown
Misc
Front rotor: Shimano XT-Saint RT86 Ice-Tech 6-Bolt Disc Rotor 203mm - $51.49 - CRC
Rear rotor: Shimano XT-Saint RT86 Ice-Tech 6-Bolt Disc Rotor 180mm - $43.99 - CRC
Front brake mount: Shimano Mount Adaptor Front Post to Post 203mm - $12.49 - CRC
Rear brake mount: Shimano SM-MA-R180-P/S Disc Mount Adapter - $28.90 ($10 shipping) - TBSM
Spacers: Hope Space Doctor Spacers Pack - $12.49 - CRC
Wheel conversion kit: Hope Pro 2 Evo MTB Rear Wheel Axle Conversion Kit X12 Thru Kit - $17.49 - Wiggle
Tubeless valves: Stan's NoTubes 35mm U-boatniversal Valve- $16.99 - Pushys
Tubeless rim tape: Stan's NoTubes Rim Tape 25mm - $22.99 ($10 shipping) - Pushys
Tubeless sealant: Stan's NoTubes Tyre Sealant Pint 16oz - $17.99 - Pushys
Spare tubes: Maxxis Welterweight 27.5 x 2.20/2.50 (650b) French/Presta Valve MTB Tube x 2 - $11.58 ($10 shipping) - Pushys
Lube: Rock "N" Roll Extreme 16oz Bicycle Lubricant Kit - $18.99 - Pushys