Turtle gear

1- For your second question, buying and selling at a higher price is the way to go. Sometimes you strike a lovely deal that can make you loads of Dolla Dollas!

2- I'll just copy this from another post I made:
Gear:
PVE----
Jacket - CON or FOC (Do not exceed more than 1 FOC armor peice)
Pants - CON or FOC (Do not exceed more than 1 FOC armor peice)
Shoes - CON
Gloves - FOC or Energy Crit % Damage
Wand - Energy Crit % Damage

PVP----
Jacket - FOC
Pants - FOC or CON
Shoes - CON
Gloves/Sub Weapon - Same as PVE

Earrings: Props Earrings, try your best!
Rings: FOC or CON (You can also go for the CC combo CD + FOC that gives extra Props I believe)
Necklace: I'd say best is probably resistence.

To add to @B4.DA.$$'s post, you'll want to use Crafted armor and weapons (or if you get lucky lvl 70 Legendary weapons). What level of armor you want to use is up to you. Lvl 70 is obviously the best, but it's also incredibly expensive to both make and upgrade. Personally, I use lvl 60 armor and weapons because their max stat boost is still passable and upgrading is much cheaper thanks to stone drop rate being high in TMQ7 and UD6.

Turtle hermits have a very long CD on their main skills so instead of prop earrings I'd go with cd reduction.

Quote from FreddyB

Turtle hermits have a very long CD on their main skills so instead of prop earrings I'd go with cd reduction.

Well, you wouldn't have to worry about CD when Props allow you to 1 shot everything

Having one of both is also plausible and many players do this.

Quote from B4.DA.$$

Well, you wouldn't have to worry about CD when Props allow you to 1 shot everything

^this
currently props are close like on tw. I use 2 prop earrings and have a 3rd cd earring in case i really need it (almost never, stun, slow and so an are on cooldown rp).

In addition a bit more detailed info on the rings (before implementation of the lvl70 BIDS dungeons):

dmg: 2x lvl60 rings ccdng floor 70 craft: the ones that give about 13 focus and 7% wild attack attribute (make sure to make your weapons attribute wild too)
you want to have 26 focus and 14% wild attack (the same rings) not the pair with the reflect.
You also can go full con then on your armor.

dmg/def balance also easier to get: pair lvl55 rings ccdng floor 50 craft: giving 9 props set bonus, so go for the pair there

also consider
necklace: go for status succes rate to make sure your debuffs land
pvp jacket: some also use anti crit
recommendation gloves: get % critical dmg, weapons (except dogis) are the only gear to stack it up and as a turtle you should want it high

If you don't know props/properties are the "Increase attack and defence properties by x" stats.
The best earrings/necklace you can get with current content are either from shenlong whish or crafted lvl60 from ccdungeon. You have to use brown boxes on them tho.

Just throwing this out there, but a good starter necklace is the one you earn from a Papaya quest. Grants +5 crit rate and 30 status resist. This can hold out until you can get the better stuff.