I remember my first trade, was a kindly and friendly trader and go smoothly trade, I haven't a WL at that moment, but start to trade for stamp meanwhile build my WL, I found great traders that I still work with them from time to time. I learned that if they doesn't have any from you WL, you can take 1-2 mins to take a look in their TL...... sometimes you can find a coupon that you can use and you don't know of their existence.
I remember too when I did a trade with a newbie and I put extras in his/her envie, but when the envie reach his/her hands the extra coupons not the requested for the trader, were expired ( was in the CP strike times) and I get my first and only negative that you can find in my FBs. Because he/she never PM about it.
I still usually trade like the same first day, like a bundles for a few things. at the bottom of my WL is written " I can always take a look in your TL if you don't have any of my WL" :)
This summer I wasn't able to update my WL or TL so much even when I got some new tearpads, I can't call companies for coupons, some of us we have not much time if we have kids.