Be sure you have done your homework in regards to how this unit is priced relative to other similar properties that have sold. If a comparable unit recently sold for $209,000, the seller may already feel that they have priced their property accordingly. If a recent unit sold for $195,000, you certainly have reason to negotiate more aggressively. Any price reduction needs to be viewed in context with similar sold or pending properties. The original price of $219,000 could very well have been an unrealistic starting point. Recent sales data will help define the pricing parameters.
Some more food for thoughts - If a seller is facing an impending foreclosure, once the bank is involved, you may find that you have lost negotiating leverage. If the seller is still involved, the seller may be able to sell the property and still make up a short fall in the mortgage at closing without bank approval. Once foreclosure proceedings take place, the seller may be left without any negotiating leverage.\
Best of luck in your search!
On the other hand, does the seller even have 10% equity? If not, an accepted offer would create a short sale situation, which is contingent on the lender's approval. So, the seller can accept anything he wants, but then you may find yourself waiting a month or two (or longer) to find out whether the lender has also accepted your offer.
Your best bet is to get these and other questions answered in order that you can know how you're able to proceed, or hire a professional to help you with those questions and your possible offer.