For the record - current StubHub ticket availability for the Phillies series at Preparation H Park at Camden Yards:
Friday 8th - 1,980 tickets left starting at $32.95
Saturday 9th - 1,377 tickets left starting at $48.99
Sunday 10th - 1,887 tickets left starting at $35
...the prices seem unusually high - has that been historically a big-drawing series? (Tickets on StubHub for the Phillies visit in early May can be had for as little as $14.)