No way am I changing my own oil at that price!
The dealer probably says the same thing and just drives your truck around back for 30 minutes :-\
I assume they hope to get other work from you, or get you in the habbit, a bit like a crack dealer giving out the first few hits for free before upping the price, hoping you wanna keep up the stamps.
As for bad dealers and shoddy work I think this can be quite a regional thing, I don't think there are many incompetent techs in the UK, but there is pressure to make profit and this tends to mean doing work quickly so right away nothing gets torqued properly and tappets are an easy target for being skipped as you have no idea if they have been done, you can mark rocker cover bolts (and I have friends who caught dealers this way) I have had bikes with dealer stamps and found they had not been done when the previous owner had been charged for the work, and on my last bike every owner on the forum who checked their own found over half needed changing and those that went to their dealers were charged for a check and told they were all OK, I reckoned they could not hear them rattling and whacked an extra 90 minutes labour on for the check.
I have had friends (real ones, people I hang around with, not forum stories) who have had brake calipers fall off and sump plugs drop out after dealer services, my own ZZR had a well nut pushed into the intake side of the airbox by my offical Kwak dealer, he had replaced it so knew what he had done and their was only one place these end up when pushed too hard when trying to get the screw to bite. The dealer did not care when I took it in after finding it and showing them their tech had left my bike in a potentially life threatening state.
Many TV shows have exposed (Mainly Car) dealers for not doing work they charged for, or for telling owners they need a new cylinder head when they just needed a new plug coil or something, I think this level of ripping people off is very uncommon with bike dealers, but my issue is I want the service done as per the manual and not just an oil / filter change.
I bought an Approved Used BMW GS from a main dealer, it had 6k on the clock and they claimed they had given it the 6k service, but the clapiers looked quite gunged up, when I questioned them they told me that the service sheet just has "inspect", so they inspect something, see it is filthy and leave it, what else that is down for an "inspect" is left, perhaps they inspect the suspension linkages and see there is no grease, but leave them as well ::010::
It was also supposed to have had FD oil done on the 1st service (500 miles) and again it was on the service history as being done at 2 years old (3.5k) I did it myself when the bike had about 8k on it and sludge came out, after that I changed it every tyre change (about 4k - 4.5k) and it always came out clean. There is no way the delaer had done that second change, and if they skipped the second change they had probably skipped the first one as well.
Maybe these dealers are in the minority but they really put people off and I think it is a real shame for good honest dealers, for the miles I do I wil not save much (one service per year) especially if you consider what I have spent on Tools over the years, if I KNEW the dealer would follow the schedule, clean dirty calipers, grease suspension linkages and take good care of my bike, re-assembling everything to the correct torque I would just get them to service it, but I have found too many bad dealers and not enough good ones and just don't trust them anymore.
The last BMW service I had I travelled 60 miles instead of 10 just because this dealers workshop was behind a huge glass screen so you could see their techs work, although when I got the bill it was £60 more than quoted and they would not even discuss the matter which lost them my business, at a point when I may have considered another BMW and gone back for future services.
When my tappets are due I will probably go to the people who stripped Nick Sanders machine after his 51k America's trip, it is a fairly small family business and they appear to be proud of the technical capabilities, Iprobably have 4-5 dealers closer and it means a day sat around while they do the work, but at least I will know it has been done. The other option is a local indie or mobile tech (Again, very easy to watch them work)