Spike Collars.

So we All know that Spikes are Rare.

Here are the rarity ratings:

Lets Start With Shorts:

The claw machine and a short spiked wristband (no black) And add depending on the person 
For 
A pink or purple short collar 

Beta wallpaper or flooring, rhino helmet, and a lesser value color short wristband 
For 
A short orange collar 

A long orange, pink, green, or yellow wristband, and a small beta (Bongos, small table, gumball machine, etc) 
For 
A short green or yellow collar 

Beta wallpaper or flooring, a good den beta, a moderately rare clothing item, And add something like a rhino helmet, a good colored worn, or a long bow, top hat, etc 
For 
A blue or red short collar 

Two long wristbands (preferably anything but orange and pink) And add a good den beta and moderately rare clothing item (see above) 
For 
A black short collar 

Longs Now:

A good colored short collar (red, blue, green, yellow) Add a beta wallpaper or flooring (if not just add a den beta that's pretty good) And a good clothing item such as rhino helmets and a long bow 
For 
A long pink collar 

One or two short collars (if two make the second one a lesser valued color) If two collars add a good den beta or clothing beta, if not two collars add a beta floor or wallpaper, and a rare clothing item 
For 
A long orange collar 

Two short collars (maybe of the color you're trading for) Add 2 good den betas. if you don't have den betas then add 2 rare clothing items 
For 
A long yellow or green collar 

3 short collars (of moderately rare colors) And add a short or long wrist (if short wrist, do a good color, if long wrist do a bad color) 
For 
A long red or blue collar 

2 long collars (one good color and one bad color) And add a den beta and long wristband 
For 
A long purple collar 

3 Long collars, and add a long wristband (or replace the wristband with a really good den or clothing beta) 
For 
A long black collar 

Thanks, 

Fall