No price in an ad is one of the most irritating things there is about shopping on the internet or in printed materials, (Auto trader, local "Shopper" and so forth).
About the only thing worse than posting no price is when car dealers say, "$500 Down" I want to pay cash for it, not finance it... And even if I do want to finance it, I still need to know how much you expect me to finance (In other words... "The selling price")... so... just TELL ME HOW MUCH IT IS.....
No pictures is another huge issue. As is leaving out pertinent information. If your going to post an ad, before you do it, take a few minutes and ask yourself this question, "If I were to buy this item, what questions would I want answered before I bought it?" If your buying a vehicle, would you lay down your money if you did not know, the year, make, model, engine size, fuel type, transmission (auto/automatic) and some of the common options, A/C, power windows/locks, cruise control... Oh yeah.. and THE PRICE!!! Yes, I know some of that does not apply to MV's, but most of it does. Remember, just because you know all this information about your item, does not mean everybody else does, or more to the point, nobody else does. The more accurate, descriptive information about the item you list in the ad the more likely you are to sell it and the more money you are likely to get for it when it does sell.
But worst of all, is the people that post an ad and then NEVER RESPOND to an inquiry. There should be a "REPORT THIS AD" button so that when there is an ad that the OP does not respond to multiple info requests the ad can be reported, a mod can look at it, verify that it is a "Dead ad" and delete it.
If there is no picture is is doubtful that I will look at the ad in the first place. It is the picture that makes me stop and take the time to read the words about the item. No pic, no stopping to read what your selling.
If there is no price 99x out of 100 I will not bother to call or email for a price, I just move on.