5 Op-amp ICs mixed: JRC4558DD/DX (3 JRC4558DX remaining, DD in stock) If you want to change the quantity or part number, I will relist it. DD only, or DX only are also available. Please comment before purchasing. The selling price is approximately calculated as 100 yen per IC + shipping + Mercari commission (10%). Although they are mixed, I can prepare them depending on the stock if you comment before purchasing. I will adjust the shipment after you inform me of the desired part numbers. The basic performance is the same, but the performance differs slightly depending on the suffix. There is no difference in the selling price due to the suffix. They have aged since manufacture. The solder legs are not shiny. Unused, so I cannot guarantee operation. Even if there is a problem with the operation after delivery, due to precision electronic components, claims and returns are not accepted. Please judge from the photos. The lot number and part number suffix are different from the photos and the listing. Shipping by Nekopos is 210 yen. The shipping method may be changed without notice. I also have other ICs, TRs, D, R, C, and vacuum tubes in stock. If you are interested, please comment and I will list them separately. I am an amateur hobbyist who used to work with electronic circuits. I have almost all the parts to build my own circuits. I am releasing my stock because I am getting older.