If you are new to rehabs then getting written bids for everything you plan to hire out is a good idea.

In one county people bid 300% of assesed value.

I would recommend getting several actual written bids and then select the one you like the best.

HI, Another I site I frequent is bid 4 assets.

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Some broker may be ok to accept less buying commision but decline.I typically negotiate my buyer commision too but to be extremely honest, only "Asian-born" is typically acceptng less buying agent negotiation, so if they're getting 2.5% and I would get 0.5%, but I mentioned to them I don't ask them to drive me around, I only want disclosure report and I would visit property myself.The problem with very high hefty buyer agent while buyer agent almost do nothing is very real issue in bay area at least, most buyer agent is just trying to force buyer to submit their bid (and their life) with zero contingency and submit 100k above listing LOL LOLthis regulation would change these mentality for sure, the seller could be more greedy by now lol.Now because buyer agent and buyer is determined upfront and then seller would have their own metric, these thing would be interesting.

No doubt someone else is going to bid.

Fixer property I bid on had 30 cash offers in 3 days. 

I recommend getting 5 bids and picking from the top three.As far as you, personally., estimating rehab costs....forget it for now.

i've seen a few 2 families on the MLS In my price range. out bidded on one and the rest were too far gone for the price the sell was asking. but I'm working towards finding off market properties, auctions, whole sellers etc.... if I can find a distressed property thats priced correctly I will try my best to grab the opportunity.