cost of spare parts from dealers

i have an RA Rodeo and after a rough trip along the Gibb River rd, my drivers side power window gave up and my passenger side started showing signs it was on the way out. possily due to the dust and rattles.

i went into 4 different Holden dealers in Broome, Karratha and Carnarvon and Geraldton to get prices for replacement power window motors, thinking i would hang out as they were getting cheaper as i made my way down the coast.

For some reason the drivers side was roughly $100 MORE than the passenger side, its exactly the same but reversed, no extra wiring, gearing etc. (obviously the most common one to pack up due to use)

The drivers side was approx $360 and the other side was around $250 plus 2hrs labour @ $100ph to have them fitted at all 4 outlets give or take $5 to $10.

being a cheapskate i just kept putting it off, and then i thought i would check ebay.
I was in luck, i found a seller who sold them, he was in Thailand and he was selling the motors for $80 each inc postage. I thought him being in Thailand and the fact that rodeos are manufactured in Thailand was just coincidental as there was no mention of it being genuine OEM and i just presumed it may be just a cheapie copy. I ordered a pair. They arrived today, brand new in an Isuzu box with isuzu labels etc. took me 20 mins a side and they work great so far.
I know people have to make a profit, but the mark up on spare parts is incredible.
When you have know choice but to get a spare part through a dealer, it really makes you feel sick to know you are being taken for a ride because you have few other options.

yes, just another daily rant from me.