Check Packet.net availability of specific server type in every location and ~💵 not collected per month

packet.net

#!/bin/bash
#Usage: default is Type 2a. If you wish another server type use ./packet.net 1/2/3
#See https://www.packet.net/bare-metal/

#Obtain api key here => https://app.packet.net/portal#/api-keys
KEY=

if [[ -z ${1+x} ]]; then
  PLAN=2a
else
  PLAN=$1
fi
echo "Checking availability of Type "${PLAN}

for i in {1..4}
do

#Locations
if [[ ${i} -eq 1 ]]; then
  FACILITY=ams1
elif [[ ${i} -eq 2 ]]; then
  FACILITY=nrt1
elif [[ ${i} -eq 3 ]]; then
  FACILITY=sjc1
elif [[ ${i} -eq 4 ]]; then
  FACILITY=ewr1
else
  echo "[CRIT] Aborting Facility error"
  exit 1
fi

if [[ ${1} = "0" ]]; then
  PRICE=33
elif [[ ${1} = "1" ]]; then
  PRICE=268
elif [[ ${1} = "2" ]]; then
  PRICE=840
elif [[ ${1} = "3" ]]; then
  PRICE=1176
else
  PRICE=744
fi

#Quantity Check
QUANTITY=50
FIRSTRUN=true
while (true); do

#curl
RETURN=`curl \
  -X POST \
  -d '{"servers":[{"$ref":"#\/definitions\/ServerInfo","facility":"'"$FACILITY"'","plan":"baremetal_'"$PLAN"'","quantity":"'"$QUANTITY"'"}]}' \
  -H "X-Auth-Token: $KEY" \
  -H "Content-Type: application/json" \
  -s -o /dev/null -w "%{http_code}" \
  https://api.packet.net/capacity`

if [ ${RETURN} -eq 503 ]; then
  unset FIRSTRUN
  if [ -z ${UP+x} ]; then
    QUANTITY=$((QUANTITY / 2))
  else
    QUANTITY=$((QUANTITY - 1))
    TOTAL=$((QUANTITY + TOTAL))
    PRICETOTAL=$((QUANTITY * PRICE))
    PRICETOTALEND=$((PRICETOTALEND + PRICETOTAL))
    echo ${QUANTITY} "Available Servers in" ${FACILITY}
    ARRAY[$FACILITY]=${QUANTITY}
    unset UP
    unset PRICETOTAL
    break
  fi
elif [ ${RETURN} -eq 204 ]; then
  QUANTITY=$((QUANTITY + 1))
  UP=1
  if [ -z ${FIRSTRUN+x} ]; then
    #do nothing
    continue
  else
    QUANTITY=$((QUANTITY + 10))
  fi
else
  echo "[CRIT] Aborting; Maybe you forgot the API key"
  exit 1
fi

done
done

echo "Total Servers: "$TOTAL
echo "Total Price: "$PRICETOTALEND