add purchase resource in model catalog

models/resources/storage.go

@@ -171,13 +171,13 @@ func (r *PricedStorageResource) GetPrice() (float64, error) {
 		add := r.UsageStart.Add(time.Duration(1 * time.Hour))
 		r.UsageEnd = &add
 	}
-	pricing := *r.SelectedPricing
-	if pricing == nil {
+	if r.SelectedPricing == nil {
 		if len(r.PricingProfiles) == 0 {
 			return 0, errors.New("pricing profile must be set")
 		}
-		pricing = r.PricingProfiles[0]
+		*r.SelectedPricing = r.PricingProfiles[0]
 	}
+	pricing := *r.SelectedPricing
 	var err error
 	amountOfData := float64(1)
 	if pricing.GetOverrideStrategyValue() >= 0 {