Why buy from a wholesaler? Find your own deals and do your own negotiating to avoid paying middleperson fees or real estate agent commissions! This will increase your profits too!
If you buy properties which are listed with an agent, they want you to pay the maximum amount so their commission will be higher. It's a conflict of interest when they want more so their commission will be higher but you need to get the price as low as possible so the deal makes sense. Most agents will say just about anything to get you to pay more. Even if you hire a buyer's agent to represent you, they are looking out for themselves to get the highest commission.
PLUS, if you are buy properties directly from owners ( versus MLS or wholesalers), you have a much better chance of negotiating to buy the property with seller financing. This will dramatically reduce your out of pocket expenses and, most importantly, you can avoid the need to get a loan with all their associated loan fees, points and other junk fees.
Never, ever expect the person selling you the house (owner, wholesaler, or agent) to provide accurate information on comps, repair costs, etc. They can easily be manipulate all this data. You need to do you OWN independent research (from multiple sources) for these important items which could make or break the profitability of your deal.