Casillas (now Validus) and McLinn were actively leasing in the township in the last three years. Casillas (bought by Validus), Switchgrass and Validus have filed quite a few OCC cases along the corridor of secs 8, 17, 20, 29 & 32. When increased density and new horizontals are filed, the buyers start offering.
Your current well has about half of its life left as far as volume. It was placed on the far east side of the section so that infill wells could be drilled someday. You are currently held by production for many more years. You can sell all, sell none or sell part. A sale could trigger capital gains. You can sit back and wait to see when/if the infill will happen. You can take what you have already made on your well and see what 3-4X more of those would look like compared to the current offer. Buyers intend to make a profit on the acreage they buy.