JRC4558DD Op-amp IC x10 If you want to change the quantity, I will relist the item, so please comment before purchasing. The selling price is approximately calculated as follows for this type of IC: unit price 100 yen + shipping fee + Mercari commission 10%. Although they are mixed, I may be able to gather the ones you want depending on the stock if you comment before purchasing. I will adjust the shipment after you inform me of the desired part number. 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. Since they are unused, I cannot guarantee their operation. Even if there is a problem with the operation after delivery, due to the nature of precision electronic components, I cannot accept claims or returns. Please make your judgment based on the photos. The lot number and the suffix of the part number differ between the photos and the listing. Shipping via Nekopos is 210 yen. The shipping method may change without notice. I also have other ICs, TRs, D, R, C, and vacuum tubes in stock, so 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 have gotten older.