Shivas,
You said that Rezko paid "3x" what the land was worth. Apparently he (actually his wife) paid the asking price, which was $625,000. According to you, it was worth maybe $210,000.
They sold the sliver to Obama for $104,000, which means Obama overpaid by about $70,000, since, according to you, the 1/6 of the lot bought by Obama was worth $35,000 (so who was bribing whom?).
The wife sold the rest of the lot, worth, according to you, $175,000, for $575,000, for a profit before expenses of about $54,000 in excess of what they paid for which was, according to you, "3x what it was worth."
Credibility, like other things, flows downhill.