I think I did ~100 orders in two days last year - does that count as 50 a day? They were calendars (Oh, I LOVE calendar orders - pop 'em in the envelope with the invoice and you're done!), and I invoiced and packed 'em up one day and labeled and posted 'em the next. Took ALL of both days. With paypal's multi-ship function available now, I could probably do 200 in a day, it just - bam! - batchprints all the labels for flatrate, and I went ahead and ordered my calendars pre-wrapped with cardstock in the middle for an extra $.14 (or something) apiece. SO worth $.14. Do you have the paypal mailing option there? and do you get your credit card orders through paypal? I do now, and it has SO simplified the whole order fulfilling process! Especially considering all the extra mail security in place right now - I am SO happy I don't have to wait in post office lines.

I may have to write out a how-it-happens article so we can compare notes. :)