[Mr. Pastorius]

Almost every city/town has a 'Wise woman' on its outskirts who will barter with you despite your character being tech-oriented. You can also select a dialogue option 'Can you identify some items for me?' which will open your inventory and then you can click on the item you want identified. The cost is 100 coins per item, but when you advance through the game, that probably won't pose a problem