1. Any warranty or comment on the quality/durability of the picks? I might be interested in getting a complete learner's set but I understand the learner's hand will probably be rough on the tools. Don't want something that'll easily break.
2. Would they also come with a tool-specific compatible guide/lesson?
Why not quote in USD so you don't always have to adjust prices?
Thanks for the questions!
1. No warranty because even experienced pickers go through tools eventually. That said, these are made of high-grade full-hard American steel. Check out this in-depth paper on types of metals used in picks to understand the difference that makes: http://elvencraft.com/lpd/Lock%20Pick%20Metallurgy.html
2. I don't quote in BTC because (a) I think it is important to bitcoin's fungibility that it isn't just a payment mode for fiat transactions and (b) I don't like the gamesmanship of changing the amount the buyer sends based on the minute-by-minute differences in price (or which exchange you pay attention to for that matter).
Hope that helps!