From the AFL site:
Richmond football operations manager Greg Miller admitted the Tigers faced two major hurdles before they could secure Polak, who would add some much-needed height to the team's small defence.
"We are reasonably (keen on Polak) but we have got budgetary constraints," Miller said.
"We have to clear someone out to be able to afford him so there is that issue (as well as coming up with a suitable trade deal for the Dockers)."
Miller said the Tigers would "definitely not" be giving up an early round draft pick for Polak.
"We are not interested in losing any of our choices in the draft and as I said there is also our financial constraints as well so we have take that into consideration as well," he said.
The Tigers' veteran administrator said he would be surprised if many clubs would be willing to give up early draft picks this year, such was the strength of the 2006 crop of draftees.
"The whole (first) day (of trading) was pretty quiet which just shows the depth of this draft," he said.
"Most clubs are talking about keeping their draft choices and I can understand why."
http://afl.com.au/default.asp?pg=news&spg=display&articleid=302501