160-200 is 27.3b EXP. Skele split I estimate at ~1.8 mesos/exp, so buying skele leech would cost you ~49b. Note that you should never pay extra for a lower level seller if the seller is below your level. Shao is 30m and should give ~24-27m exp/kill (I think? That's just from looking at mob exp and basic distributions, haven't actually tested) for ~1.1 meso/exp or ~30b, but it'll take almost 3 years if that's all you do. Krex is slightly more expensive than shao, but still cheaper than skele. Would speed things up significantly. Not sure HT leech rates. Not really sold much, you'd have to cut a deal with a group that runs consistently.
The price will vary depending on the service provider. My records show that I can offer 700m exp to clients each day. At the standard rate for general users, you'd be looking at a daily cost of 1b coin+. attention please that this service is extremely strenuous, so it's just a suggestion.
