4700 + to a newbie is a tough sell
will you accept escrow?
do you have any friend in hongkong ? i can arrange the visit and the guy can test all miners and then ship it to you !
Let me know ! 
2 s9's at bitmain cost 798  will do 27th
if I order 2 and my friend orders 2   that is the exact amount of hash you are selling.
we spend 1600 no trump tax and no fear of delivery.  gear comes on sept 10-15
if I convince you to sell yours for 4700 with safe escrow  gear comes aug 15
you mine 53 x 30 x 0.0000245 for 30 days = 0.0390 BTC x 11700 = 457 usd - 80 for power you are  + 377 for the 30 days you have the s17 from you
but 4700 - 1600 = 3100 more for your gear.
so take 3100- 377 = 2723 more for your gear.
now it is sept 15 I have you gear and my 4 s9's running head to head.
your gear 53th for 2.22 kwatts my gear  54 th for 5.22 kwatts   that is 3 x 24 = 72 kwatts  at 5 cents it is 3.60 a day at 10 cent power it is 7.20 a day
2723/3.60 = 756 days before the s17 is better then  4 s9's new from bitmain this is a 5 cent power guy.
2723/7.20 = 378 days before the s17 is better then 4 s9's new from bitmain this is a 10 cent power guy.
or my case i split coins with my power guy
so have 27 th for free  with the s-9's
or I have 26.5 th for free with your s17
that means I never recoup the extra 2723 I pay to you  but my power guy  gets less power cost for his ½ the coins.
your price is a tough sell for me.
I have a mix of gear
s9
s15
s17
t15
t17
m10
m20
m20s
inno t2-t24
inno t3-t40
inno t3-t50
and l3+
I could just buy s9's
 and l3+   I make out but it is not fair to my power guy
I could buy all your gear my power guy would make out but I get killed.
I am trying to explain to you that 
a big price 
a newbie
no escrow  make your gear a tough sell on the forum to anyone that could pay you for them  most of us that have 20000 usd don't want to buy that gear for 4700 each.