Overall, I really like your taste (if the selection has been made by you), and here is what I think:
1- The Qum has a pile of kurk wool with cotton foundation. I am not crazy about the colors in this rug, but if you are planning to use it in a high traffic area, this is a good choice as far as the durability. I think $950-$1200 would be a fair value for this rug.
2- I absolutely love this Isfahan, nice pattern (called Gonbad and not Gombad), beautiful colors. As for the market value, this rug is worth $2400-$2600.
3- This is a 40 raj Mahi pattern from Khoy. These rugs are bought and sold as Tabriz but the exact place of origin would be Khoy, not that it makes any difference to you. Personally, I like 50 raj Mahi much better than lower quality. I think although the price would be higher for 50 raj Mahi, the difference is well worth it. A fair market value for this rug would be $650-$750.
4- This is also a good Isfahan rug with the same Gonbad design as rug number 2, and of course, the "Hakimi" signature as well as the silk foundation make it more valuable. However, I like the color combination in number 2 much better than this piece. I would say a fair market value for this rug is $1200-$1400.
5- This is a Gholtogh rug from Zanjan area and not a Bijar rug. However, due to their geographic proximity, they are very close. Like a bijar, Gholtogh rugs are also very durable. However, pricewise, they are a bit lower than Bijar. This one in your picture is one of the nicer pieces of Gholtogh I have seen. The value would be $450-$550.
I hope you will find my reply helpful. These are only my opinion and I could be very wrong about all of them. I realize that my knowledge is extremely limited. I also hope that nobody will find my opinion insulting. Good Luck.