You might want to read up on how to wholesale a property. Read some blogs and watch some podcasts. From the sounds of it you're not ready to make an offer. I know you want to jump right in and others say that is the way to go but you need to educate yourself about what you're actually jumping into.
That being said, you need to get your numbers squared away. Where did u get the ARV of 300k? How did you come to the rehab figure of 100k? Also, with this property being on the MLS for 140 days, its fair to say you're not the first to see it. My problem with listed properties, especially those that need repairs is the agent over promising the seller. The seller has most likely entertained offers from other investors and isn't willing to budge on price (not motivated...yet).
Take this time and educate yourself on what you need to do. Dealing with an agent they will want to see some sort of proof of funds, they'll expect a nice deposit as well. Thus is after you put in your offer at less 95k to make this deal work (with your numbers).
Good luck