I just keep collecting ETP on price pull-backs...my biggest purchase was when it plummeted to the low 20's...that was insane. So far, I've been able to accrue close to 3600 shares...at very low prices...and am happy as can be to collect the quarterly distributions. I think this is easily worth about 60 under calmer market conditions...and will continue to collect units and dividends until it gets there.
About 80-90% of distribution is tax deferred. Do not understand your other question since ETP is a partnership and at the end of the year you get a K-1. The K-1 allocates profits, interest income and other stuff. A simplified basic rule of thumb for cost basis is Cost +/- allocated profit/loss on line 1 of K-1, minus distributions paid.