HI Guys:

Just got started in this bought a prism tensor 3.1 wrapped it around a volleyball net -- lmao !!! 5 hours later i was able to have untangled and save 3 of the four lines. One of the yellow brake lines is pretty frayed - ok so they want $45 for these two lines really !!!

so I was looking online thinking its just a brake line there's not much power or anything can I just but a roll of this dyneema on ebay and cut it to length and tie it on ?

I don't know what you mean by "cut it to length and tie it on". You should not simply cut away the bad section of the damaged line and tie new line in to it as the knot will weaken the line by up to 50%. You should replace the whole line and don't forget to sleeve booth of the ends so the knot doesn't chew through the line. I would use 150# spectra / dyneema for break lines. If you can't figure out what # the current lines are or buy a replacement spool with the same # rating you should replace both lines. You can buy a spool and replace them easily enough. Don't forget to prestretch the line before sizing as the lines will stretch under load and over time.