Try Northern Tool. Bought one from them last year for 1900.00. 200 gal skid sprayer, 300' hose with an electric reel and spray gun. I have been using it to spray trees, shrubs and EAB applications. For the money you can't beat it.
I don't know which northern tool is selling a 200 gallon tank for $1900 but on their web site it's listed for almost twice that amount. Did you ever sell that 200 gallon tank btw? Guys if you happen to have one or know someone who is selling a 200 or 300 spit tank(100/200) please let me know asap!! I've got about $2800 max to spend.