I already contacted the person selling the guinea pigs and I'll be sure to post more if i have any questions and upload pics when I get them!
Selling the pigs? Yikes, we are all pro-adoption here. I would not recommend buying pigs, because they can have inbreeding problems, mites, upper respiratory infections. Even private breeders can have these.
Is this person selling on Craigslist? Are they a breeder or someone looking to re-home their pet? This is a big difference!
One big reason why we don't support adoption is because of the surplus of guinea pigs out there in rescues and shelters that need loving homes. Please adopt or take a pig from a
legitimate re-homing ad. We all want to give the pigs of the world a better life, and adoption is a fantastic way to do just that.
Also, if you are building a 2x4 C&C then a 4'x8' sheet of coroplast will do the trick. The extra will serve you well; you can make a box to go under the hay and 'upholster' it with fleece; there are endless uses for extra coroplast.
If however, you want just enough coroplast to build the bottom of the cage with 6" sides, then you will need a 40"x68" sheet of coroplast.
Hope that it helped! When I joined here, I didn't know about the wonders of adoption, C&C cages, or Oxbow and KMS Hayloft. I didn't know what was so bad about buying from breeders and pet stores. However, now that you have a plethora of information before you there is no reason why you cannot give 2 adopted sows the best life that they can possibly have.