Wow, at SSA: 
https://glp1forum.com/threads/sigma...ides-ancillaries-aas-and-more.3294/post-54072
 
So that is only 67 cents per mg (plus shipping from China).  At that price, you can even do your own third-party test.
But it doesn't appear in stock right now: "Retatrutide 12mg, 24mg, 36mg is available in stock."
From SSA's China warehouse:
| Product | Quantity | Lab | Price Option 1 | Price Option 2 | Price Option 3 | 
|---|
| RT5 Retatrutide | 5mg * 10 vials | Janoshik | 80 | 78 | 75 | 
| RT10 Retatrutide | 10mg * 10 vials | Janoshik | 130 | 125 | 120 | 
| RT12 Retatrutide | 12mg * 10 vials |  | 150 | 145 | 140 | 
| RT15 Retatrutide | 15mg * 10 vials | Janoshik | 180 | 175 | 170 | 
| RT20 Retatrutide | 20mg * 10 vials | Janoshik | 210 | 205 | 200 | 
| RT24 Retatrutide | 24mg * 10 vials |  | 235 | 230 | 225 | 
| RT30 Retatrutide | 30mg * 10 vials | Janoshik | 275 | 270 | 265 | 
| RT36 Retatrutide | 36mg * 10 vials |  | 295 | 290 | 285 | 
| RT50 Retatrutide | 50mg * 10 vials |  | 375 | 370 | 365 | 
| RT60 Retatrutide(10ml) | 60mg * 10 vials |  | 400 | 395 | 390 | 
 
| Shipping line | <500g | 1kg | 2kg | 
|---|
| USA, Europe and other countries | $45 | $55 | $80 | 
| Canada & Australia special lines | $45 | $60 | $90 | 
| Express UPS/Fedex/DHL (noreship policy) | $60 | $90 | $110 | 
 
For SSA's US warehouse (as low as $1.07/mg):
| Product | Quantity | Price (USD) | Price (EUR) | Shipping | 
|---|
| RT5 Retatrutide | 5mg * 10 vials | 110 | 220 | Free shipping | 
| RT10 Retatrutide | 10mg * 10 vials | 170 | 340 | Free shipping | 
| RT20 Retatrutide | 20mg * 10 vials | 250 | 500 | Free shipping | 
| RT30 Retatrutide | 30mg * 10 vials | 320 | 640 | Free shipping | 
 
By the way, one theory regarding their sourcing: