Please understand that while we may temporarily lower prices, we generally do not respond to price negotiations. Management Number: #5A417 This is a removed part from a Yamaha SG-600 manufactured around 1980-1981. Considering the business aspect, parts should have been standardized as much as possible, so it is thought to be a common part with other models. Based on our confirmation using catalogs, it appears to be compatible with the following models manufactured around the same time. (In addition, there is a possibility that it was also installed and used in other models manufactured around the same time.) SG500 / SG600 / SG700 / SG800 / SG800S SJ500 SX800A * This product is not a 4-core type compatible with Bi-Sound, but in the catalogs at the time, both the 4-core Bi-Sound compatible and the 2-core non-compatible types were listed as "GII", and it is believed that they are the same except for the number of cores. We have cleaned it to some extent before listing, but the dirt has not been completely removed. As shown in the photos taken of the conductivity measurement, there appears to be no problem with the operation of the pickup, and there were no problems before removing it from the guitar. The pickup lead wires are cut at the base of the switch and pot to which they were connected, so they should be long enough if you are installing them in the same model, etc. Regarding the free shipping method, we may change it to another method at our discretion.