You do not need a Realtor to represent you on the purchase of a new development home, although it costs you nothing nor will it add to the price of your purchase if you do have representation. In the 2007 year, I was able to successfully negociate down the sales price of homes for 4 different clients I represented. The largest adjustment/reduction was $130,000 in upgrades and incentives.
If you decide to go it alone, I would suggest you obtain local "Sold" comparables in and around the Columbus Grove area to help substantiate your price reduction request. Another avenue you can go down is to ask for a upgrades, but have the builder buy them down for you with incentives (there is a large price mark-up on these features). The last incentive I would suggest you request is mortgage fees & interest rate buy downs from the lender the builder is working with.
I hope this helps and I wish you the best of luck. If you'd like to view any current listings in that area, simply click on my website.
Robert M. van der Goes
Star Real Estate - Realtor