15 x 30mm screw on spikes:  $1.29 / $2.10 (Highest:  $8)

25 x 13mm screw on spikes:  $2.06 (BIN:  $6.50)

15 x 29mm screw on spikes:  $1.81 (BIN:  $7.50)

50 18mm round studs:  $1.06 (BIN:  $3.50)

100 x 9.5mm screw on spikes:  $2.32 (Highest:  $16.50)

15 x 20mm screw on spikes:  $1.45 (Highest:  $8.50)

All off eBay.

I kind of wish I paid less for a lot of these.  If I just waited, I could have gotten most of them for around a dollar!

Oh well.  It was still a lot less than I would have paid anywhere else.

It takes so long to DIY though...I don't think I'll be doing them for a while.  I bought all of these for specific purses!